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某小店为了回收啤酒瓶,规定3个空瓶换1瓶酒.一个人买了10瓶酒,喝完之后,又拿空瓶换酒,问他一共可以再换到多少瓶啤酒? 这个问题好解决.10个空瓶换3瓶酒,还剩1个空瓶;喝完后,手里有4个空瓶,拿3个空瓶又换1瓶酒;喝完后,手里有2个空瓶.要是你认为用空瓶只能换回4瓶酒,那就错了. 事实上,他可以换回5瓶酒.因为他只要找朋友借一个空瓶,凑够3个空瓶,换回1瓶酒;把
In order to recycle beer bottles, a small shop requires 3 empty bottles for 1 bottle of wine. One person bought 10 bottles of wine, and after drinking, he took another empty bottle for wine and asked him how many bottles of beer he could exchange again. Good solution: 10 empty bottles for 3 bottles, 1 empty bottle left; after drinking, there are 4 empty bottles in hand, 3 empty bottles and 1 bottle of wine; after drinking, there are 2 hands in hand. Empty bottles. If you think that using empty bottles can only replace 4 bottles of wine, you are wrong. In fact, he can exchange 5 bottles of wine. Because he only needs to find a friend to borrow an empty bottle and get enough of 3 empty bottles. , In exchange for 1 bottle of wine;